Applied. thanks, -Len On Tue, 17 Jun 2008, Zhao Yakui wrote: > Subject:[ACPI]:Add DMI check to disable mwait for CPU C-states > From: Zhao Yakui <yakui.zhao@xxxxxxxxx> > > Add the DMI check to disable mwait for CPU C-states. > If the board is matched with DMI table, OSPM should not use mwait for CPU > C-states even when mwait is supported. In such case the C2C3_FFH access mode > will be disabled. > > http://bugzilla.kernel.org/show_bug.cgi?id=10807 > > Signed-off-by: Zhao Yakui <yakui.zhao@xxxxxxxxx> > Signed-off-by: Li Shaohua <shaohua.li@xxxxxxxxx> > > --- > drivers/acpi/processor_core.c | 22 ++++++++++++++++++++++ > 1 file changed, 22 insertions(+) > > Index: linux-2.6/drivers/acpi/processor_core.c > =================================================================== > --- linux-2.6.orig/drivers/acpi/processor_core.c > +++ linux-2.6/drivers/acpi/processor_core.c > @@ -121,6 +121,23 @@ static const struct file_operations acpi > > struct acpi_processor *processors[NR_CPUS]; > struct acpi_processor_errata errata __read_mostly; > +static int set_no_mwait(const struct dmi_system_id *id) > +{ > + printk(KERN_NOTICE PREFIX "%s detected - " > + "disable mwait for CPU C-stetes\n", id->ident); > + idle_nomwait = 1; > + return 0; > +} > + > +static struct dmi_system_id __cpuinitdata processor_idle_dmi_table[] = { > + { > + set_no_mwait, "IFL91 board", { > + DMI_MATCH(DMI_BIOS_VENDOR, "COMPAL"), > + DMI_MATCH(DMI_SYS_VENDOR, "ZEPTO"), > + DMI_MATCH(DMI_PRODUCT_VERSION, "3215W"), > + DMI_MATCH(DMI_BOARD_NAME, "IFL91") }, NULL}, > + {}, > +}; > > /* -------------------------------------------------------------------------- > Errata Handling > @@ -1102,6 +1119,11 @@ static int __init acpi_processor_init(vo > return -ENOMEM; > acpi_processor_dir->owner = THIS_MODULE; > > + /* > + * Check whether the system is DMI table. If yes, OSPM > + * should not use mwait for CPU-states. > + */ > + dmi_check_system(processor_idle_dmi_table); > result = cpuidle_register_driver(&acpi_idle_driver); > if (result < 0) > goto out_proc; > > -- To unsubscribe from this list: send the line "unsubscribe linux-acpi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
